Drilling machine



iillll lll 2 Sheets-Sheet 1 C. B. CARGILE DRILLING MACHINE Filed July '7, 1921 Feb. 26, 1924;

Cu B- CARGILE DRILLING MACHINE Filed July '7.

1921 2 Sheets-Sheet 2 INVENTOB ATTGRf-IEYS patented ch. 26, E92 3.

stares CHESLEY B. GABGILE, OF ST. PAUL, MINNESOTA.

DRILLING- MACHINE.

Application filed July 7,

To aZZ whom it may concern.

Be it known that I, Giansnnr B. CARGILE', a citizen of the United States, and a resident of Paul, in the county of Ramsey nd State of Minnesota, have invented a cw and useful Improvement in Drilling 'viachines, of which the following is a full, clear, and exact description.

My invention relates to improvements in traclcbonding drills, and it consists in the combinations, constructions and arrangements herein described. and claimed.

f ne of the objects of my invention is to provide a power track-bonding drill that be easily manipulated by one man.

r'inother object is to provide a machine of class described of such weight that the operator can lift it up and away from the track on the moments notice of an approaching train.

Another object to provide a machine having its weight. equally distributed on both sides of the rail, thus enabling the ma chine to be moved along the rail with as little effort as possible.

ther objects and advantages will appear in the following specification, and the novel features of the invention will be particularly pointed out in the appended claim.

My invention is illustrated in the accompanying drawings, forming part of this application, in which Figure 1 is a vertical section through the center of the machine, and

Figure 2 is a top plan view with the gas engine and part of the drive shaft removed.

Referring now to the drawings in detail in which similar numerals refer to similar parts in both of the views:

A main supporting frame 1 of metal tub-v ing to which a length of angle iron 2 is attached and which is used to provide a flat bearing surface where the machine rests upon the rail 3 on its surface 4: has attached by means of the elbows 5, 6, 7 and 8 an upper frame, the construction and use of which will be hereinafter described.

A webbed angle iron 9 is secured to the horizontal leg of the angle iron 2 and provides means for positioning the machine against the. rail 3. Game 10 and 11, mounted on the shaft 12 and operated by means of the foot lever 13, serve to grip the ball of the rail securely and hold the machine in position for drilling when the foot lever 1921. Serial No. 482,931.

shaft 12 is made to accommodate the foot lever 13 at either of its ends at the convenience of the operator.

. The drilling mechanism consists of a spindle 15 mounted to slide toward and away from the rail in the brass bearings 16 and 17. The bearing '17 extends out so as to cover the spindle 15 when it is in its retracted position. Bearings 16 and 17 are mounted in the cast metal pieces 18 and 19. Means for supporting said cast pieces is provided in the angle iron 20 which is securely fastened to the angle iron 2 by means of rivets through the plates 21 and 22. These plates, beside serving as tie plates, provide bearings for the cam shaft 12 aforedescribed.

' The spindle 15 is driven by means of a small. gasoline engine secured to the frame 1 at 2 1 by means of bolts 25. A shaft 26 coupled to the engine shaft at 27 and turning in the bearing 28 has secured at its end the sprocket gear 29. Support for the bearing 28 is provided by an upwardly extending portion of the cast piece 18. A link-chain 30, having engagement with the teeth of the sprocket gear 29, serves to drive the larger sprocket gear 31, which, by means of a key 32, having engagement with the keyway 33 of the spindle shaft 15, causes said shaft to turn. A sheet metal housing 23 enclosing the large sprocket gear 31 and its bearing, serves to keep out any dirt that may otherwise be picked up by the rapid travel of the link-chain over the sprocket gear 31.

Means for lubricating the bearings 16, 17 and 28 is provided by the grease cups 34, 35 and 36 respectively.

An enlarged portion 37 of the spindle shaft 15, having a longitudinal bore 38 and a set screw 40, serves as a chuck to hold the drill 39.

The spindle shaft 15 with its drill is moved toward and away from the rail 3 by means comprising a hand lever 41, pivotally mounted at 42 on a lug portion 13 of the cast piece 19, intermediate levers 44c and 45, the latter of which is connected by a fourth lever 46 to a lug portion 4-7 of the cast piece 18, and a ball-type thrust bearing 48, pivotally mounted by means of the pins 49 to a bifurcated portion 50 of the lever 45. The hand lever 41 is made sufliciently long so that the operator can manipulate it while standing up.

Means for moving the machine along the rail is provided by two rollers 51 and 52 secured to the angle iron 2 by lugs 53 so that the rollers just'clear the surface of the rail when the machine is in a stable position. In moving the machine, the operator tilts it so that its Weight rests on one of the two rollers and then rolls it along the rail.

A bar 54 securedto the machine by bolts 55 provides a'rest for the machine upon the ties 56. This bar 54 is necessary to insure a rest on the ties 56, on account of the wide spaces between them and is made adjustable by means" of the bolts 55 to approximately level the drill spindle in its engagement with the different sizes of rails.

-The' upper frame work lengths of tubing 57, 58 and 59 and supported by upright lengths of tubing 60 and 61 on the main frame 1, serves to protect the operator from the moving parts of the engine, andin general adds strength and du rability to the machine. This upper frame also forms a substantial holding means when the operator removes the machine from the track or "carries the machine about. I The lengths 57 and 58 of the frame afford a convenient gripping means when theoperator desires to tilt the machine on one of its two rollers 51 and 52.

In the operation of my power track-bonding drill, the machine is set over the place where the web of the rail is to be drilled, the machine resting on'the surface of the rail at 4 and upon the ties along the bar 54. The foot lever 13 is then pressed down,

comprising causingthe cams l0 and 11 to grip the ball of the rail. pulled back, pressing the drill 39 against the rail until the hole is drilled. The operator retractsthe drill by pushing the hand lever forward. He then removes his foot from the foot lever 13, releasing the cams 10 and 11.7 To reach a new place on the rail, he grips one of the bars of the upper frame and tilts the machine so that its weight rests on one of the two rollers 51 and 52. It is then an easy matter to move the machine said carriage against movement relative to 7 said rail at wlll, a power driven drill mech-' anism having a'dri'll'spindle arranged for The hand lever 41 is then longitudinal movement to and away from said rail, 3, protecting guide sleeve for receivlng sald drill spindle when not extending toward said rail, an adjustable horizon-' tal auxiliary support for said carriage arranged'to rest upon the ties or ground adjacent to said rail, and rollers rotatably mounted on said carriage out of normal engagement with said rail and arranged to engage said rail when said carriage is tilted in the direction of the longitudinal axis of said rail.

CHESLEY B. CARGILE. 

